302 lines
7.7 KiB
C++
302 lines
7.7 KiB
C++
|
|
#define YAP_CPP_DB_INTERFACE 1
|
|
|
|
//! @{
|
|
|
|
/**
|
|
*
|
|
* @defgroup yap-cplus-db-interface Data-Base Component of YAP interface.
|
|
*
|
|
* @ingroup yap-cplus-interface
|
|
* @tableofcontents
|
|
*
|
|
*
|
|
* Data-base component of C++ interface to YAP. It manipulates sets of
|
|
* atoms, each one containing a number of props.
|
|
*/
|
|
|
|
class YAPTerm;
|
|
|
|
class YAPError;
|
|
|
|
class YAPModule;
|
|
|
|
/**
|
|
* @brief YAPModule
|
|
* A YAPModule describes a bare module, which in YAP is just a name.
|
|
*
|
|
* Info about the module is in YAPModuleProp
|
|
*
|
|
*/
|
|
class YAPModule : protected YAPAtomTerm {
|
|
friend class YAPPredicate;
|
|
YAPModule( Term t ): YAPAtomTerm( t ) {};
|
|
Term t() { return gt(); }
|
|
Term curModule() {CACHE_REGS return Yap_CurrentModule(); }
|
|
public:
|
|
~YAPModule( ) {};
|
|
YAPModule( ): YAPAtomTerm( curModule() ) {};
|
|
YAPModule( YAPAtom t ): YAPAtomTerm( t ) {};
|
|
};
|
|
|
|
/**
|
|
* @brief YAPModuleProp
|
|
* A YAPModuleProp controls access to a module property.
|
|
*
|
|
*/
|
|
class YAPModuleProp: public YAPProp {
|
|
friend class YAPPredicate;
|
|
ModEntry *m;
|
|
|
|
YAPModuleProp(ModEntry *mod) {m = mod;};
|
|
YAPModuleProp(Term tmod) { m = Yap_GetModuleEntry(tmod); };
|
|
public:
|
|
YAPModuleProp() { CACHE_REGS m = Yap_GetModuleEntry(Yap_CurrentModule()); };
|
|
YAPModuleProp(YAPModule tmod) ;
|
|
virtual YAPModule module() { return YAPModule(m->AtomOfME); };
|
|
};
|
|
|
|
/**
|
|
* @brief YAPFunctor represents Prolog functors Name/Arity
|
|
*/
|
|
class YAPFunctor: public YAPProp {
|
|
friend class YAPApplTerm;
|
|
friend class YAPPredicate;
|
|
Functor f;
|
|
/// Constructor: receives Prolog functor and casts it to YAPFunctor
|
|
///
|
|
/// Notice that this is designed for internal use only.
|
|
YAPFunctor( Functor ff) { f = ff; }
|
|
public:
|
|
~YAPFunctor( ) { };
|
|
/// Constructor: receives name as a string plus arity
|
|
///
|
|
/// Notice that this is designed for ISO-LATIN-1 right now
|
|
YAPFunctor( char * s, arity_t arity) { f = Yap_MkFunctor( Yap_LookupAtom( s ), arity ); }
|
|
/// Constructor: receives name as a wide string plus arity
|
|
///
|
|
/// Notice that this is designed for UNICODE right now
|
|
YAPFunctor( wchar_t * s, arity_t arity) { f = Yap_MkFunctor( Yap_LookupWideAtom( s ), arity ) ; }
|
|
/// Constructor: receives name as an atom, plus arity
|
|
///
|
|
/// This is the default method, and the most popi;at
|
|
YAPFunctor( YAPAtom at, arity_t arity) { f = Yap_MkFunctor( at.a, arity ); }
|
|
|
|
/// Getter: extract name of functor as an atom
|
|
///
|
|
/// this is for external usage.
|
|
YAPAtom name(void) {
|
|
return YAPAtom( NameOfFunctor( f ) );
|
|
}
|
|
|
|
/// Getter: extract arity of functor as an unsigned integer
|
|
///
|
|
/// this is for external usage.
|
|
arity_t arity(void) {
|
|
return ArityOfFunctor( f );
|
|
}
|
|
|
|
};
|
|
|
|
/**
|
|
* @brief Predicates
|
|
*
|
|
* This class interfaces with PredEntry in Yatom.
|
|
*/
|
|
class YAPPredicate: public YAPModuleProp {
|
|
friend class YAPQuery;
|
|
|
|
protected:
|
|
PredEntry *ap;
|
|
|
|
/// auxiliary routine to find a predicate in the current module.
|
|
PredEntry *getPred( Term &t, Term* &outp ) ;
|
|
|
|
/// String constructor for predicates
|
|
///
|
|
/// It also communicates the array of arguments t[]
|
|
/// and the array of variables
|
|
/// back to yapquery
|
|
YAPPredicate(const char *s, Term &out, Term &vnames ) {
|
|
CACHE_REGS
|
|
BACKUP_MACHINE_REGS();
|
|
Term *outp;
|
|
|
|
out = Yap_StringToTerm(s, strlen(s)+1, LOCAL_encoding, 1200, &vnames ) ;
|
|
//extern char *s0;
|
|
//fprintf(stderr,"ap=%p arity=%d text=%s", ap, ap->ArityOfPE, s);
|
|
// Yap_DebugPlWrite(out);
|
|
// delete [] ns;
|
|
if (out == 0L)
|
|
throw YAPError::YAP_SYNTAX_ERROR;
|
|
ap = getPred( out, outp);
|
|
RECOVER_MACHINE_REGS();
|
|
}
|
|
|
|
|
|
/// Term constructor for predicates
|
|
///
|
|
/// It is just a call to getPred
|
|
inline YAPPredicate(Term t) {
|
|
CELL * v = NULL;
|
|
ap = getPred( t , v );
|
|
}
|
|
|
|
/// Cast constructor for predicates,
|
|
/// if we have the implementation data.
|
|
///
|
|
inline YAPPredicate(PredEntry *pe) {
|
|
ap = pe;
|
|
}
|
|
|
|
public:
|
|
~YAPPredicate() {};
|
|
|
|
/// Functor constructor for predicates
|
|
///
|
|
/// Asssumes that we use the current module.
|
|
YAPPredicate(YAPFunctor f) {
|
|
CACHE_REGS
|
|
ap = RepPredProp(PredPropByFunc(f.f,Yap_CurrentModule()));
|
|
};
|
|
|
|
/// Functor constructor for predicates, is given a specific module.
|
|
///
|
|
inline YAPPredicate(YAPFunctor f, YAPTerm mod) {
|
|
ap = RepPredProp(PredPropByFunc(f.f,mod.t));
|
|
}
|
|
|
|
/// Name/arity constructor for predicates.
|
|
///
|
|
inline YAPPredicate(YAPAtom at, YAPTerm mod) {
|
|
ap = RepPredProp(PredPropByAtom(at.a,mod.t));
|
|
}
|
|
|
|
|
|
/// Name/0 constructor for predicates.
|
|
///
|
|
YAPPredicate(YAPAtom at);
|
|
|
|
/// Mod:Name/Arity constructor for predicates.
|
|
///
|
|
inline YAPPredicate(YAPAtom at, arity_t arity, YAPModule mod) {
|
|
if (arity) {
|
|
Functor f = Yap_MkFunctor(at.a, arity);
|
|
ap = RepPredProp(PredPropByFunc(f,mod.t()));
|
|
} else {
|
|
ap = RepPredProp(PredPropByAtom(at.a,mod.t()));
|
|
}
|
|
}
|
|
|
|
/// Atom/Arity constructor for predicates.
|
|
///
|
|
YAPPredicate(YAPAtom at, arity_t arity);
|
|
|
|
|
|
/// module of a predicate
|
|
///
|
|
/// notice that modules are currently treated as atoms, this should change.
|
|
YAPModule module() {
|
|
if (ap->ModuleOfPred == PROLOG_MODULE)
|
|
return YAPModule(AtomProlog);
|
|
else
|
|
return YAPModule(AtomOfTerm(ap->ModuleOfPred));
|
|
}
|
|
|
|
/// name of predicate
|
|
///
|
|
/// notice that we return the atom, not a string.
|
|
YAPAtom name() { if (ap->ArityOfPE)
|
|
return YAPAtom((Atom)ap->FunctorOfPred);
|
|
else
|
|
return YAPAtom(NameOfFunctor(ap->FunctorOfPred));
|
|
}
|
|
|
|
/// arity of predicate
|
|
///
|
|
/// we return a positive number.
|
|
arity_t getArity() { return ap->ArityOfPE; }
|
|
};
|
|
|
|
/**
|
|
* @brief PrologPredicate
|
|
*
|
|
* This class interfaces with Predicates Implemented in Prolog.
|
|
*/
|
|
class YAPPrologPredicate: public YAPPredicate {
|
|
public:
|
|
YAPPrologPredicate(YAPAtom name,
|
|
arity_t arity,
|
|
YAPModule module = YAPModule(),
|
|
bool tabled = false,
|
|
bool logical_updates = false,
|
|
bool local = false,
|
|
bool sourced = true,
|
|
bool discontiguous = false,
|
|
bool multiFile = false,
|
|
bool hidden = false,
|
|
bool untraceable = false,
|
|
bool unspyable = false,
|
|
bool meta = false,
|
|
bool sync = false,
|
|
bool quasi_quotable = false,
|
|
size_t mega_clause = 0
|
|
);
|
|
void *assertClause( YAPTerm clause, bool last=true, YAPTerm source= YAPTerm(TermNil));
|
|
void *retractClause( YAPTerm skeleton, bool all=false);
|
|
void *clause( YAPTerm skeleton, YAPTerm &body );
|
|
};
|
|
|
|
/**
|
|
* @brief PrologPredicate
|
|
*
|
|
* This class interfaces with Predicates Implemented in Prolog.
|
|
*/
|
|
class YAPFLIP: public YAPPredicate {
|
|
public:
|
|
YAPFLIP(CPredicate call,
|
|
YAPAtom name,
|
|
arity_t arity,
|
|
YAPModule module = YAPModule(),
|
|
CPredicate retry = 0,
|
|
CPredicate cut = 0,
|
|
size_t extra = 0,
|
|
bool test = false
|
|
) : YAPPredicate( name, arity, module) {
|
|
if (retry) {
|
|
Yap_InitCPredBackCut(name.getName(), arity, extra, call, retry, cut, UserCPredFlag);
|
|
} else {
|
|
if (test) {
|
|
YAP_UserCPredicate (name.getName(),
|
|
call, arity);
|
|
} else {
|
|
YAP_UserCPredicate (name.getName(),
|
|
call, arity);
|
|
}
|
|
}
|
|
|
|
};
|
|
YAPFLIP(const char *name,
|
|
arity_t arity,
|
|
YAPModule module = YAPModule(),
|
|
bool backtrackable = false
|
|
) : YAPPredicate( YAPAtom(name), arity, module) {
|
|
if (backtrackable) {
|
|
Yap_InitCPredBackCut(name, arity, 0, 0, 0, 0, UserCPredFlag);
|
|
} else {
|
|
YAP_UserCPredicate (name,
|
|
0, arity);
|
|
}
|
|
};
|
|
bool addCall(CPredicate call) {
|
|
return Yap_AddCallToFli( ap, call );
|
|
}
|
|
bool addRetry(CPredicate call) {
|
|
return Yap_AddRetryToFli( ap, call );
|
|
}
|
|
bool addCut(CPredicate call) {
|
|
return Yap_AddCutToFli( ap, call );
|
|
}
|
|
|
|
};
|